Statistics - Probability

1. According to a study the popular belief is 80% of adults enjoy drinking beer. If 3 adults were chosen at random from this study, what would the probability be that none of them enjoy drinking beer? Explain how you found your answer.

2. A family has 5 children and 1 of them is a boy...the percentage of boy is 1/5, or .020. Do you think one could say the chances of any woman having a boy would be 1/5?